Separable fastener



F. S. CARR.

SEPARABLE FASTENER.

APPLICATION FILED JAN. 16, 1920.

1,387,116. PatentedAug; 9,1921.

Invew?o Ew'd 5. Cow-r,

FRED S; CARE; OF NEWTON, MASSACHUSETTS, ASSTGNOR T CARR FASTENERCOIYEPANY, OF CAMBRIDGE, MASSACHUSETTS, A CORPORATION OF MAINE.

SEPARABLE FASTENER.

Specification of Letters Patent.

Patented Aug. 9, 1921.

Application filed. January 16, 1920. Serial No. 351,737.

T 0 all whom it may concern Be it known that I, FRED S. CARR, a citizenof the United States, and resident of Newton, in the county of Middlesexand Commonwealth of Massachusetts, have invented an Improvement inSeparable F asteners, of which the following description,

I and preferably in more than one determined direction.

In the drawings, which show'a preferred embodiment of one form of myinvention:

Figure 1 is an elevation of two pieces of fabric held together by apreferred form of fastener;

Fig. 2 is a section on the line 2-2 of Fig. 1;

Fig. 3 is a section on the line 33 of Fig. 2, showing the socket and theneck of the stud in their normal position when not under strain; and

Fig. 4: shows the parts of the socket when under lateral strain in adirection toward the left of said figure.

Referring to the drawings and to the pre ferred form of my inventionselected for illustrative purposes, I have shown the stud 5, which maybe of any suitable form and secured to the stud-carrying fabric 6, inany suitable way, but preferably by an expansible base 7 wedging thefabric 6 within a stud-securing cap 8. The preferred form of socketherein shown includes a casing 9 secured to stud-carrying fabric 10 inany suitable way, as by sewing, but preferably by stud-securing prongs11 flanged over to press the stud-securing fabric over a lip on anysuitable stud-securing cap 12. The studsecuring casing 9 preferablyincloses a spring 13, which is preferably flat and provides astud-receiving aperture 14 and which is preferably split at one side at15. T

The preferred form of socket herein shown preferably provides forcooperating cam surfaces between the spring and coopadapted to hold thespring 13 closed under lateral strain in at least one direction, and

preferably in more than one direction.

In the preferred form of socket herein illustrated, the cam surfaces onthe spring 13 may include cam surfaces 18 and 19, corresponding tosimilar cam surfaces on the spring shown in the application of Andrew G.Anderson, filed herewith, Serial No. 351,7 86. These cam surfaces maycooperate with cam surfaces 16 and 17, which may conveniently beprovided by a ring 20, which maybe stamped from sheet metal and inclosedin the casing. I also preferably providercam surfaces 21 and 22 on thespring adapted to cooperatewith cooperating cam surfaces 23 and 24.which may conveniently also be provided by the stamped sheet metal ring20. When lateral strain is exerted between the stud and socket in such adirection as to move the spring to the left in the socket casing, asshown inFig. 41, the cam surfaces 16 and 17 abut against the camsurfaces 18 and 19, thereby tending to keep the spring closed. Whenstrain is exerted in a directlon tending to move the spring to the rightin the socket casing, as viewed in Fig. l, the cam surfaces 21 and 22abut against the cooperating cam surfaces 23 and 24: and tend to closethe spring and prevent undesired separation of the stud from the socket.

It will be understood that I use the word fabric in its broader sense toinclude not only woven materials, but any flexible carrying medium.

While I have shown and described a preferred form of one embodiment ofmy invention, it will be understood that changes involving omission,substitution, alteration and reversal ofparts and even changes in themode of operation, may be made with} out departing from the scope of myinvention, which is best defined in the following claims.

Claims:

1. A separable fastener comprising, in combination, a stud having a headand a neck, and a socket containing a spring, said spring providing astud-receiving aperture and an opening at one side thereof, sa1d springhaving opposltely disposed cam surface on each side of the opemng, sa1dcam surfaces all located on pro ect1ons from the s rarer err.

crating parts, such cam surfaces being spring and adapted tocooperatewith correspending cam surfaces independent of the spring.

2. A separable fastener comprising, in combination, a stud having a headand a neck, and a socket including a casing and a spring carried therebyhaving a strid-receiw ing aperture and an opening at one side thereof topermit expansion and contraction of the stud-receiving aperture, a ringbetween the sides of the casing and the sides of the spring, said ringpermitting expansion and contraction of the spring when not underlateral strain, but opposing expansion of the stud-receiving aperturewhen lateral. strain is exerted between stud and socket in a directiontoward the opening in the spring.

3. A separable fastener comprising, in combination, a stud having a headand a neck, and a socket includinga casing and a spring carried therebyhaving a stud-receiving aperture and an opening at one side thereof topermit expansion and contraction. of the stud-receiving aperture, a ringbetween the sides of the casing and the sides of the spring, said ringpermitting expansion and contraction of the spring when not underlateral strain, but opposing expansion of the stud-receiving aperturewhen lateral strain is exerted between stud and socket in a directionaway from the opening in the spring.

4. A se arable fastener comprisin in in a direction either toward orcombination, a stud having a head and a neck, and a socket including acasing and a spring carried thereby having a stud-receivaierture and anopening at one side thereof to permit expansion and contraction of thestud-receiving aperture, a ring between the sides of the casing and thesides of the spring, said ring permitting expansion and contraction ofthe spring when not under lateral strain, but opposing expansion of thestud-receiving aperture when lateral strain is exerted between stud andsocket away from the opening in the spring.

5, n separable fastener comprising, in combination, a stud having a headand a neck, and a socket including a casing and a spring carried therebyhaving a stud-receiving aperture and an openingat one side thereof topermit expansion and contraction of the studreceiving aperture, ,a ringrotatable in the casing and located between the sides of the casing andthe sides of the spring, said ring permitting expansion and contractionof the spring when not under lateral strain, but opposin expansion ofthe stud-receiving aperture when lateral strain is exerted between studand socket in a direction toward the opening in the spring.

in testimony whereof, I name to this specification.

FRED S. CARR,

have signed my

